标签：key sed mapping cep 压缩包 产品 mode dpi int
现在的需求的：
根据产品族、产品类型，下载该产品族、产品类型下面的pic包；
pic包是zip压缩文件；
t_product表：
这些包以blob形式存在另一张表中：
t_imagefile表：
现在要做的是：将接入网、OLT下面的两个包downloadPIC：MA5800系列-pic.zip 和 MA5900-pic.rar一起打包成zip压缩文件下载下来；
代码：
ProductController.java:
/** * 根据产品族、产品类型下载照片包 */ @RequestMapping("/downloadwBatch") public void downloadwBatch(HttpServletRequest request, HttpServletResponse response, String productFamily, String productType){ //http://localhost:8080/MySSM/downloadwBatch?productFamily=接入网&productType=OLT try { productFamily = new String(productFamily.getBytes("iso-8859-1"), "utf-8"); productType = new String(productType.getBytes("iso-8859-1"), "utf-8"); } catch (UnsupportedEncodingException e) { e.printStackTrace(); } //获取要下载的照片包名 Map<String, String> params = new HashMap<String, String>(); params.put("productFamily", productFamily); params.put("productType", productType); List<String> packageNames = productService.getPackageNamesByFamilyAndType(params); //根据包名获取待下载的文件 文件名-字节数组的形式 Map<String, byte[]> files = new HashMap<String, byte[]>(); for(String packageName : packageNames){ byte[] f = productService.getPackage(packageName); if(f!=null){ files.put(packageName, f); } } //设置下载的压缩包名 String zipName = productFamily + "_"+ productType + ".zip"; //根据文件，进行压缩，批量下载 if(files.size() > 0){ productService.downloadBatchByFile(response, files, zipName); } }
ProductService.java:
/** * 根据包名获取文件 */ public byte[] getPackage(String packageName){ byte[] bag = null; try{ ImageFile m = productMapper.getPackage(packageName); if(m!=null){ bag = m.getPicture(); } }catch(Exception e){ e.printStackTrace(); } return bag; } /** * 根据产品族、产品类型 获取待下载的包名 * @param params * @return */ public List<String> getPackageNamesByFamilyAndType(Map<String, String> params) { List<String> packageNames = productMapper.getPackageNamesByFamilyAndType(params); return packageNames; } /** * 根据文件，进行压缩，批量下载 * @param response * @param files * @throws Exception */ public void downloadBatchByFile(HttpServletResponse response, Map<String, byte[]> files, String zipName){ try{ response.setContentType("application/x-msdownload"); response.setHeader("content-disposition", "attachment;filename="+URLEncoder.encode(zipName, "utf-8")); ZipOutputStream zos = new ZipOutputStream(response.getOutputStream()); BufferedOutputStream bos = new BufferedOutputStream(zos); for(Entry<String, byte[]> entry : files.entrySet()){ String fileName = entry.getKey(); //每个zip文件名 byte[] file = entry.getValue(); //这个zip文件的字节 BufferedInputStream bis = new BufferedInputStream(new ByteArrayInputStream(file)); zos.putNextEntry(new ZipEntry(fileName)); int len = 0; byte[] buf = new byte[10 * 1024]; while( (len=bis.read(buf, 0, buf.length)) != -1){ bos.write(buf, 0, len); } bis.close(); bos.flush(); } bos.close(); }catch(Exception e){ e.printStackTrace(); } }
ProductMapper.java:
/** * 根据包名获取文件 */ public ImageFile getPackage(String packageName) throws Exception; /** * 据产品族、产品类型 获取待下载的包名 */ public List<String> getPackageNamesByFamilyAndType(Map<String, String> params);
ProductMapper.xml:
<!-- 根据包名获取文件 --> <select id="getPackage" parameterType="java.lang.String" resultType="com.cy.model.ImageFile"> select * from t_imagefile where packageName = #{packageName} </select> <!-- 跟据产品族、产品类型 获取待下载的包名 --> <select id="getPackageNamesByFamilyAndType" parameterType="java.util.Map" resultType="java.lang.String"> select packageName from t_imagefile m join t_product p on m.packageName = p.downloadPic where p.productFamily = #{productFamily} and p.productType = #{productType} </select>
测试：
在浏览器中输入：http://localhost:8080/MySSM/downloadwBatch?productFamily=接入网&productType=OLT
下载结果如下：
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标签：key sed mapping cep 压缩包 产品 mode dpi int
原文地址：http://www.cnblogs.com/tenWood/p/7582436.html
